The radium isotope 226 Ra has a hall-life of 1600years. A sample begins with 3.50x1010 226 Raatoms.Y Part CNSubmitHow many are left after 400 years?195] ΑΣΦSubmit Request AnswerPart BHow many are left after 2000 years?N=1971 ΑΣΦSubmitHow many are left after 35000 years?Request AnswerΜΕ ΑΣΦΑRequest AnswerBAC??

The half-life of 226Ra is T1/2 = 1600yr and the Initial amount is N0 = 3.50 x 1010

The radium isotope 226 Ra has a hall-life of 1600 years. A sample begins with 3.50x1010 226 Ra atoms Y Part C N= Y Submit Submit [5] ΑΣΦ Part B N= Submit How many are left after 35000 years? 15] ΑΣΦ How many are left after 2000 years? Request Answer years? Request Answer [6] ΑΣΦΑ Request Answer SAPC ? ? ?

The radium isotope 226 Ra has a hall-life of 1600 years. A sample begins with 3.50x1010 226 Ra atoms Y Part C N= Y Submit Submit [5] ΑΣΦ Part B N= Submit How many are left after 35000 years? 15] ΑΣΦ How many are left after 2000 years? Request Answer years? Request Answer [6] ΑΣΦΑ Request Answer SAPC ? ? ?

Inquiry into Physics

8th Edition

ISBN:9781337515863

Author:Ostdiek

Publisher:Ostdiek

Chapter11: Nuclear Physics

Section: Chapter Questions

Problem 21P

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Similar questions

In a 3109 yearold rock that originally contained some 238U, which has a halflife of 4.5109 years, we expect to find some 238U remaining in it. Why are 226Ra, 222Rn, and 210Po also found in such a rock, even though they have much shorter halflives (1600 years, 3.8 days, and 133 days, respectively)?
undergoes alpha decay, (a) Write the reaction equation, (b) Find the energy released in the decay.
Check Your Understanding Nucleus X is two times larger than nucleus Y. What is the ratio of their atomic masses?
The ceramic glaze on a red-orange “Fiestaware” plate is U2O3and contains 50.0 grams of 238U, but very little 235U. (a) What is the activity of the plate? (b) Calculate the total energy that will be released by the 238U decay, (c) If energy is worth 12.0 cents per kWh , what is the monetary value of the energy emitted? (These brightly- colored ceramic plates went out of production some 30 years ago, but are still available as collectibles.)
Data from the appendices and the periodic table may be needed for these problems. 50V has one of the longest known radioactive halflives. In a difficult experiment a researcher found that the activity of 1.00 kg of 50V is 1.75 Bq. What is the halflife in years?
World War II aircraft bad instruments with glowing radium-painted dials. The activity of one such instrument was 1.0105Bq when new. (a) What mass of 226Ra was present? (b) After some years, the phosphors on the dials deteriorated chemically, but the radium did not escape. What is the activity of this instrument 57.0 years after it was made?
The particles emitted in the decay of 3H (tritium) interact with matter to create light in a glow- in-the-dark exit sign. At the time of manufacture, such a sign contains 15.0 Ci of 3H. (a) What is the mass of the tritium? (b) What is its activity 5.00 y after manufacture?
In the following eight problems, write the complete decay equation for the given nuclide in the complete XZAN notation. Refer to the periodic table for values of Z. decay of 226Ra, another isotope in the decay series of 238U, FIrst recognized as a new element by the Curies. Poses special problems because its daughter is a radioactive noble gas. In the following four problems, identity the parent nuclide and write the complete decay equation in the XZAN notation. Refer to the periodic table for values of Z.
Suppose you have a pure radioactive material with a half-life of T1/2. You begin with N0 undecayed nuclei of the material at t = 0. At t=12T1/2, how many of the nuclei have decayed? (a) 14N0 (b) 12N0(C) 34N0 (d) 0.707N0 (e) 0.293N0
Data from the appendices and the periodic table may be needed for these problems. (a) The 210Po source used in a physics laboratory is labeled as having an activity of 1.0 (Ci on the date it was prepared. A student measures the radioactivity of this source with a Geiger counter and observes 1500 counts per minute. She notices that the Source was prepared 120 days before her lab. What fraction of the decays is she observing with her apparatus? (b) Identify some of the reasons that only a fraction of the (s emitted are observed by the detector.
In the following eight problems, write the complete decay equation for the given nuclide in the complete XZAN notation. Refer to the periodic table for values of Z. decay of 210Po, the isotope of polonium in the decay series of 238U that was discovered by the Curries. A favorite isotope in physics labs, since it has a short halflife and decays to a stable nuclide.